A nanotecnologia aplicada à veiculação de fármacos: estudos de desenvolvimento da formulação e caracterização
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2013
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O ácido azelaico é um fármaco com actividade bacteriostática para muitos microorganismos sendo por isso frequentemente aplicado no tratamento do acne. Porém, às formulações tópicas deste fármaco estão geralmente associados alguns efeitos adversos e fracas adesões à terapêutica. Assim, a nanotecnologia pode ser aqui considerada como uma estratégia inovadora para ultrapassar os obstáculos anteriores. O objectivo deste estudo centrou-se no desenvolvimento e caracterização de nanopartículas de PLGA contendo o ácido azelaico. As nanopartículas foram produzidas através do método modificado de emulsificação/difusão do solvente e posteriormente incluídas num gel de Carbopol 940. Foram caracterizados vários parâmetros da formulação tais como potencial zeta, tamanho da partícula e eficiência de encapsulação. O tamanho médio das partículas foi de 378,63 nm (com I.P. cerca de 0,09) e o potencial zeta foi de -7,82 mV. Aeficiência de encapsulação do ácido azelaico foi de 76 ± 3,81%. Consequentemente, estas nanopartículas poderão ser consideradas ferramentas úteis para a veiculação do ácido azelaico.
Azelaic acid shows bacteriostatical activity against many microorganism species and is commonly used in the treatment of acne. However, some technical issues and a reduced patient compliance have been associated with its topical application forms. Thus, nanotechnology may represent an innovative strategy that might help to overcome these problems. The objective of this study was to develop and to characterize PLGA nanoparticles containing azelaic acid. Nanoparticles were produced by a modified spontaneous emulsification/solvent diffusion method and then included into a gel of Carbopol 940. Several parameters were characterized such as zeta potential, particle size and encapsulation efficiency. Particle mean size was 378.63 nm (with PI around 0.09) and zeta potential was -7.82 mV. The encapsulation efficiency of azelaic acid was 76 ± 3.81%. Consequently, these PLGA nanoparticles can be considered a useful tool for azelaic acid delivery.
Azelaic acid shows bacteriostatical activity against many microorganism species and is commonly used in the treatment of acne. However, some technical issues and a reduced patient compliance have been associated with its topical application forms. Thus, nanotechnology may represent an innovative strategy that might help to overcome these problems. The objective of this study was to develop and to characterize PLGA nanoparticles containing azelaic acid. Nanoparticles were produced by a modified spontaneous emulsification/solvent diffusion method and then included into a gel of Carbopol 940. Several parameters were characterized such as zeta potential, particle size and encapsulation efficiency. Particle mean size was 378.63 nm (with PI around 0.09) and zeta potential was -7.82 mV. The encapsulation efficiency of azelaic acid was 76 ± 3.81%. Consequently, these PLGA nanoparticles can be considered a useful tool for azelaic acid delivery.
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CIÊNCIAS FARMACÊUTICAS, PHARMACEUTICAL SCIENCES, NANOPARTÍCULAS PLGA, PLGA NANOPARTICLES, MEDICAMENTOS, DRUGS, SISTEMAS DE LIBERTAÇÃO DE MEDICAMENTOS, DRUG DELIVERY SYSTEMS, NANOTECNOLOGIA, NANOTECHNOLOGY, ESTUDOS DE CASO, CASE STUDIES, NANOPARTÍCULAS, NANOPARTICLES